Payment and network faults.

I've been a rain user for almost 4 years now. I use rain because we don't have fibre cables installed in my area. I need WiFi and uncapped data to earn a salary as my job is an online job. Rain has not debited me for two months and I struggle to make contact with their call centre. They have now cut off my access and require a full payment of R1200 some change. I have made contact with rain customer service to make a payment arrangement but they refuse to and want a full payment. I requested that I will pay 50 percent on the 31st of October and 25 percent on the 15th of November and the balance at the month end. I was told that the only payment arrangement they are able to assist me with is payment in full. I have explained to them in order for me to make the payments I need access to the internet. Besides their uncooperativeness, 50 percent of the month rain is down but we are billed for it.